The porn star is telling a different story, and she's been posting images that she claims are photos of her and Tyga having sex (with him on the bottom) to her Instagram page.

One pic is captioned, "[Blac Chyna] can you or [Kylie Jenner] confirm that this is my dick going in your man's a--hole raw hence his nickname #TRaw - I will wait. Full video up at 12 am if I don't have my money."

It's unclear what kind of money Isabella was demanding and from whom, but her Instagram pic was recently deleted (blackmail and graphic images of anal sex will do that).

Apparently not one to go quietly, however, Mia has set up a new account under the name OfficialMiaIsabellaX, and her tagline reads, "Thought deleting was gonna stop me? Video when I reach 2k [followers]"

Mia's new account is currently at about 1,600 followers, so it looks like T-Raww could have some serious explaining to do very soon.